KR101204310B1 - Cooling system for amphibious vehicle - Google Patents

Abstract

PURPOSE: A cooling system for an amphibious vehicle is provided to improve cooling efficiency by using an air cooling device and a water cooling device according to the driving condition of the amphibious vehicle. CONSTITUTION: A cooling system for an amphibious vehicle comprises a heat radiation unit(100), an air cooling device(200), a water cooling device(300), a controller(400), an opening and closing device(500), and a driving state detector(600). The air cooling device comprises a cooling fan(210) and air inlet and outlet and is operated in ground driving. The water cooling device comprises a water inlet(310), an inflow driver(330), a sprinkler(340), a water collector(350), and a discharge driver(360) and is operated in water driving. The controller controls the air cooling device and the water cooling device. The opening and closing device opens the air inlet and outlet while in an air cooling mode and closes the air inlet and outlet while in a water cooling mode. The driving state detector detects the driving condition of the amphibious vehicle and transfers the result to the controller.

Description

Amphibious Vehicle Cooling System {COOLING SYSTEM FOR AMPHIBIOUS VEHICLE}

The present invention relates to a cooling system for amphibian vehicles, and more particularly, to improve the cooling efficiency during water operation, and to fundamentally prevent equipment damage and sinking due to water inflow during water operation. A cooling system for an amphibious vehicle that can be easily operated.

In general, amphibious vehicles such as amphibians and amphibian armored vehicles are designed to be ground-based and water-based vehicles, depending on the situation.

These amphibious vehicles are equipped with a power transmission system for amphibious vehicles that selectively distributes engine power to wheels for ground operation and water propellers for water operation, so that both ground and water performance can be secured. do.

The amphibian is provided with a cooling system that cools the coolant, the return fuel, and the lubricating oil heated in the gearbox. If the amphibious vehicle is equipped with a turbocharged engine, the supercharged air heated by the engine is cooled in addition to the coolant, return fuel, and lubricating oil listed above.

Conventional amphibious vehicle cooling system is implemented in most air-cooled manner to cool the object to be cooled using air without distinguishing between the ground operation and the water operation. The cooling system of the air cooling system comprises a heat dissipation unit through which a cooling object passes, a cooling fan for blowing air to the heat dissipation unit, and an air inlet and outlet for air to cool the heat dissipation unit.

Therefore, the conventional amphibious vehicle cooling system continuously introduces external air through the air inlet for continuous cooling of the radiator, and the heated air is discharged through the air inlet after cooling the radiator. This cooling system is of course active during aquatic operations. The problem is that more than 70% of the vehicles are submerged during aquatic operations. If high crests occur on the surface of the water, water can enter through this air inlet. to be.

In addition, when the amphibious vehicle obtains or exits, the body may be inclined temporarily and water may flow through the air inlet. As such, if water is introduced through the air inlet for various reasons, there is a problem that the equipment inside the vehicle may be damaged by the water.

In particular, if the cooling system breaks down due to water inflow during water operation, the engine may be stopped during water operation in a situation where water cannot be discharged quickly, and thus the vehicle may be completely out of control.

In addition, if a large amount of water is introduced there is a fatal problem that the vehicle gradually loses buoyancy and water inflow is accelerated, leading to the worst sinking of the vehicle.

In order to improve this problem, the water barrier device has been developed and applied to protrude to a predetermined height at the periphery of the air inlet during the water operation, but it is not a fundamental solution to the problem, such as worsening weather or during operation Depending on the various situations that may occur, there is still a potential risk of water entering the air inlet, causing equipment failure or sinking the vehicle.

In order to solve the problems as described above, the present invention, the water can be cooled by the heat dissipation unit with a high cooling efficiency when using the water in the water running, the water in the water running through the air inlet can be essentially blocked. To provide a cooling system for amphibious vehicles that can be easily operated even if the ground operation and the water operation are repeated repeatedly.

In order to solve the above problems, the amphibian vehicle cooling system according to the present invention is installed in the amphibian vehicle, the heat dissipation unit through which the cooling object passes, the air-cooling device for cooling the heat dissipation unit during the ground running, water running A cooling system comprising a water cooling apparatus for cooling the heat dissipation unit and a controller for controlling the operation of the air cooling apparatus and the water cooling apparatus, the air cooling apparatus comprising: a cooling fan for blowing air toward the heat dissipating unit; And an air outlet through which air for cooling the heat radiating part flows in and out; The water cooling device, the water inlet for water from the outside of the amphibian; An inlet driver installed in a cooling pipe connected to the water inlet to provide water inflow power; A sprinkler for spraying water introduced into and connected to the cooling pipe to the heat dissipation unit; A water collector for receiving heated water through the heat dissipation unit; And a discharge driver installed in the discharge pipe provided outside of the amphibian in the water collector to discharge the water contained in the water collector; the air cooling mode in which the air cooling device operates and the water cooling device in operation Water cooling mode is optional.

The amphibious vehicle cooling system may further include an opening and closing device installed at the air inlet and controlled by the controller to open the air inlet in the air cooling mode and to close the air inlet in the water cooling mode. Can be.

The amphibious vehicle cooling system is installed on an outer surface of the amphibian vehicle, a driving state detector for detecting a state in which the amphibious vehicle is submerged in water and transmitting a detection signal to the controller; The controller may be configured to control the air-cooling device and the water-cooling device to operate in the water-cooling mode and the air-cooling mode, respectively, depending on whether the sensed signal is transmitted.

The watering device and the water collecting device may be provided at the upper side and the lower side of the heat dissipating unit so that water sprayed from the watering unit to the heat dissipating unit may be dropped by gravity and accommodated in the water collecting unit.

The water cooling apparatus further includes a water level detector for measuring the water level of the water contained in the water collector and transmitting the measured value to the controller, wherein the controller comprises the discharge driver when the measured value is equal to or greater than a predetermined reference level value. It can be provided to operate.

The heat dissipation unit includes a boost air radiator, a coolant radiator, a return fuel radiator, and a lubricating oil in which the boost air, the coolant, the return fuel heated in the engine of the amphibian vehicle, and the lubricating oil heated in the gearbox of the amphibian vehicle flow in and out respectively. It may comprise a radiator.

The water cooling device is installed in the water inlet and the first filtration unit for filtering large foreign substances contained in the water flowing from the outside, and installed in the cooling pipe and passing through the first filtration unit to the inlet driver It may further include a filtration unit comprising a second filtration unit for secondary filtering the small foreign matter contained in the water to be transferred.

According to the cooling system for amphibious vehicles of the present invention, the air-cooling unit cools the heat radiating unit using air in the air-cooling mode during the ground operation, and the water-cooling unit cools the heat-dissipating unit using the external water in the water cooling mode during the water operation. Thus, the cooling efficiency at the time of water operation can be improved through water cooling using water having a cooling effect superior to that of air.

In addition, the water cooling mode further includes an opening and closing device for closing the air inlet, it is possible to fundamentally prevent water from flowing through the air inlet during the water operation. Accordingly, the damage of equipment caused by the inflow of water and the sinking of the vehicle due to the loss of buoyancy can be fundamentally prevented.

And the switching between the air-cooled mode and the water-cooled mode, including the operation of the switchgear, the driving state detector provided to detect the driving state of the amphibian vehicle and the detection signal of the driving state detector to control the air-cooling unit and the water-cooling unit It can be made automatically by the controller can be easily operated.

In addition, the sprinkler and the water collector provided in the water cooling apparatus, respectively, is provided on the upper side and the lower side of the heat dissipation unit so that the water sprayed from the water radiator to the heat dissipation unit can be naturally accommodated by the gravity fall into the collector. It is simple and compact to implement.

1 is a schematic view showing a cooling system for an amphibian according to a preferred embodiment of the present invention;
2 is a configuration diagram showing a state in operation in the air cooling mode in the cooling system for an amphibian according to a preferred embodiment of the present invention,
3 is a configuration diagram showing a state of preparing to switch from the air cooling mode to the water cooling mode in the amphibian vehicle cooling system according to a preferred embodiment of the present invention,
4 is a configuration diagram showing a state in which the operation started in the water-cooled mode in the cooling system for amphibian according to a preferred embodiment of the present invention,
5 is a configuration diagram showing a state in operation in the water cooling mode in the cooling system for an amphibian according to a preferred embodiment of the present invention,
6 is a configuration diagram showing a state in which the switching to the air cooling mode from the water cooling mode in the amphibian vehicle cooling system according to a preferred embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art to which the present invention pertains (hereinafter, referred to as a person skilled in the art) may easily perform the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

The amphibious vehicle cooling system according to the present invention is provided in an amphibian vehicle designed to be capable of both ground and water operations, by air-cooled method when operated by ground, by water-cooled method when operated by water, cooling water heated by an engine, The present invention relates to a system for efficiently cooling a cooling object such as lubricating oil heated in a return fuel and a gearbox.

In the following description, the state in which cooling is performed by the air cooling method at the time of the above ground operation is called air cooling mode, and the state in which cooling is performed by the water cooling system at the time of water service is called water cooling mode.

Hereinafter, with reference to the accompanying Figure 1, it will be described in detail the configuration and effect of the cooling system for amphibian vehicle according to a preferred embodiment of the present invention.

Amphibious vehicle cooling system according to a preferred embodiment of the present invention, the heat dissipation unit 100, air-cooling device 200, water cooling device 300, controller 400, switchgear 500 and driving state detector 600 It is made, including.

The heat dissipation unit 100 is provided with a cooling object such as supercharged air, cooling water, return fuel, and lubricating oil heated in the gearbox 12, which are heated in the engine 11, and has a surface area capable of quickly dissipating heat. This increased heat dissipation structure is realized.

More specifically, the heat dissipating unit 100 includes a boost air radiator 110, a coolant radiator 120, a return fuel radiator 130, and a lubricating oil radiator 140, each of which is provided with a passage of air, coolant, return fuel, and lubricating oil. The charge air, the coolant and the return fuel are charged air radiator 110, the coolant radiator 120 through the boost air pipe 111, the coolant pipe 121 and the return fuel pipe 131 connected to the engine (11). ) And the return fuel radiator 130 respectively.

The lubricating oil flows into and out of the lubricating oil radiator 140 through the lubricating oil pipe 141 connected to the gearbox 12.

Although not shown in the drawings, the charge air radiator is continuously discharged along the charge air pipe 111, the coolant pipe 121, the return fuel pipe 131, and the lubricant pipe 141, respectively. A drive unit (not shown), such as a pump for flowing into and out of the 110, the coolant radiator 120, the return fuel radiator 130, and the lubricating oil radiator 140, is provided together.

The air cooling apparatus 200 performs cooling of the heat radiating unit 100 by air cooling, and is operated when the amphibious vehicle 10 in the air cooling mode is operated on the ground. To this end, the air cooling device 200 comprises a cooling fan 210 and the air inlet 220.

The cooling fan 210 serves to blow air toward the heat dissipation unit 100 so that air passes through the heat dissipation unit 100 and draws heat from the cooling object, and the air inlet 220 is a heat dissipation unit ( 100) It is formed in communication with the outside so that air for cooling flows out and in.

The air inlet 220 may be provided with a grill formed with a plurality of air flow paths to effectively guide the entrance and exit of air.

The water cooling apparatus 300 performs cooling of the water radiating unit 100 in the water cooling method, and is operated when the amphibian vehicle 10 is in the water cooling mode. To this end, the water cooling device 300 is a water inlet 310, filtration unit 320, inlet driver 330, watering machine 340, water collector 350, discharge driver 360 and the water level detector 370 It is made, including.

The water inlet 310 is formed in the lower portion of the amphibian vehicle 10 that is immersed in the water stably during the water operation, as shown in Figure 1 is a passage through which external water flows. The water inlet 310 may be provided with a grill formed with a plurality of flow paths to effectively guide the inflow of water.

The filter unit 320 serves to filter foreign matter contained in the water flowing into the water inlet 310. The filtration unit 320 is installed in the water inlet 310 and the cooling pipe 311 connected to the first filtration unit 321 and the water inlet 310 to primarily filter large foreign matter contained in the water flowing from the outside. And a second filtration part 322 for secondarily filtering small foreign substances contained in the water passing through the first filtration part 321 and being transferred to the inflow driver 330.

However, such a filtration unit 320 is not necessarily provided in the water cooling device 300 of the amphibian vehicle cooling system according to the present invention.

The inflow driver 330 is provided as a pump, is installed in the cooling pipe 311 connected from the water inlet 310 to the sprayer 340 to provide power to the water inlet 330.

As shown in FIG. 1, the sprinkler 340 is disposed above the heat dissipation unit 100 and is connected to the cooling pipe 311 to evenly distribute the water introduced into the water inlet 310 to the heat dissipation unit 100. It serves to spray. To this end, the sprinkler 340 may be implemented in the form of a pipe formed with a plurality of sprinkling holes to the lower side, the implementation manner is not necessarily limited thereto.

The water collector 350 is disposed in the form of a water tank and disposed below the heat dissipation unit 100. The water collector 350 is sprayed to the heat dissipation unit 100 by the sprinkler 340, and the heated water passes through the heat dissipation unit 100. It is a place to be dropped by gravity and accommodated.

In the cooling system for amphibian vehicles according to the preferred embodiment of the present invention, the watering machine 340 and the water collecting unit 350 are provided on the upper side and the lower side of the heat dissipation unit 100, respectively, and the water sprayed by the sprayer 340. The heat dissipating unit 100 is taken to take the heat from the object to be cooled and is naturally accommodated by the water collector 350 while falling by gravity, but has a simple configuration and made compact, but the implementation manner is necessarily limited thereto. Make sure it's not.

For example, the sprinkler 340 may be implemented to spray water from the side of the heat dissipation unit 100, the water collector 350 is not provided on the lower side of the heat dissipation unit 100 and a separate water collection pipe and It may be implemented in the form of collecting the water passing through the heat dissipation unit 100 using a driver.

The discharge driver 360 is provided with a pump, etc., the water received in the collector 350 is installed in the discharge pipe 351 provided to the outside of the amphibian vehicle 10 in the collector 350 is discharge pipe ( It provides the power discharged to the outside through 351.

At this time, the end formed to the outside of the amphibian vehicle 10 of the discharge pipe 351 is installed on the upper portion which is not submerged in water even during water operation is provided so that it can always discharge the water smoothly.

The water level detector 370 is installed inside the water collector 350 to measure the level of water contained in the water collector 350, and transmits the measured value to the controller 400. The controller 400 receiving the measured value operates the discharge driver 360 when the measured value is equal to or greater than a predetermined reference level value.

That is, the discharge of water by the discharge driver 360 is not always performed during the water cooling mode, and the predetermined operating time only when the water level in the water collector 350 measured by the water level detector 370 is higher than or equal to the reference level value. The discharge driver 360 is operated while the discharge driver 360 is not operated when the water level is low after the operation time has elapsed.

Of course, the amphibian vehicle cooling system according to the present invention is not necessarily provided with such a water level detector 370, the discharge driver 360 may be implemented in a form that is always driven at a slow speed.

The controller 400 serves to control the operation of the air-cooling device 200, the various components provided in the water-cooling device 300 and the opening and closing device 500 to be described later.

In particular, the controller 400 receives a detection signal from the driving state sensor 600 to be described later, and depending on the presence or absence of the detection signal, the air-cooling device 200, the water-cooling device 300 and the air-cooling mode to operate respectively The switch 500 is controlled.

That is, the controller 400 operates the cover driver 520 of the opening / closing device 500 to be in the water cooling mode when the detection signal is received from the driving state sensor 600. To close the operation, the operation of the air-cooling device 200 is stopped, and the water-cooling device 300 is operated in full swing.

On the contrary, the controller 400 opens the air inlet 220 by operating the cover driver 520 of the switchgear 500 to be in the air cooling mode when the detection signal is not received from the driving state detector 600. The operation of the water cooling apparatus 300 is stopped, and the air cooling apparatus 200 is operated.

In this case, the control of the air cooling device 200 of the controller 400 is implemented by operation control of the cooling fan 210, and the control of the water cooling device 300 is controlled to the inflow driver 330 and the discharge driver 360. Is implemented with operational control.

In addition, as described above, the controller 400 receives the measured value of the water level detector 370 and compares it with a preset reference level value to operate the discharge driver 360 for a predetermined operation time. Also do.

The opening and closing device 500 includes a sealing cover 510 and a sealing cover 510 provided to be reciprocated with respect to the air inlet 220 so as to open and close the air inlet 220 according to the air cooling mode and the water cooling mode. It comprises a cover driver 520 for conveying.

The opening and closing device 500 serves to fundamentally block the inflow of water through the air inlet 220 by completely closing the air inlet 220 during the water cooling mode under the control of the controller 400. Of course, the opening and closing device 500 may be implemented to be manually controlled by the driver.

The driving state detector 600 is provided on at least one of the front, rear, and both sides of the amphibian vehicle 10, and detects whether the installed position is submerged in water, and generates a detection signal when submerged in water. Pass in 400.

That is, the driving state detector 600 serves to confirm to the controller 400 whether the amphibious vehicle 10 is operating on the ground or in the water, so that the controller 400 automatically checks the operating state of the cooling system. Allows you to switch to air or water cooling mode.

The amphibian vehicle cooling system according to the present invention is not necessarily provided with such a driving state detector 600, the driver may be implemented in the form of manually switching the operating state of the cooling system.

1 to 6, the operation and use state of the cooling system for amphibian according to the preferred embodiment of the present invention will be described in detail.

2 to 6, the amphibian vehicle cooling system according to a preferred embodiment of the present invention is operating in the air-cooled mode, the state ready to switch from the air-cooled mode to the water-cooled mode, the state started to operate in the water-cooled mode, water cooling It is a block diagram which shows the state which is operating in the mode, and the state which switched to the water cooling mode from the water cooling mode, respectively.

First, as shown in FIG. 2, when the amphibian vehicle 10 is traveling on the ground, that is, when the cooling system is operating in an air-cooled mode, the cooling fan 210 operates to radiate heat while the air inlet 220 is opened. To cause wind to the side (100). The air passing through the heat dissipation unit 100 cools the object to be cooled and the heated air is discharged to the outside through the air inlet 220.

Next, when the amphibian vehicle 10 obtains and attempts to start the water operation, as shown in FIG. 3, the driving state sensor 600 is submerged in water and transmits a detection signal to the controller 400, and the controller 400. ) Automatically stops the operation of the cooling fan 210 according to the detection signal, and operates the cover driver 520 to close the air inlet 220 with the airtight cover 510, thereby cooling the air to the water cooling mode. Prepare for the transition.

Subsequently, when the amphibian vehicle 10 starts to operate in the water, as shown in FIG. 4, the inflow driver 330 of the water cooling apparatus 300 is operated by the controller 400 so that external water enters the water inlet 310. The water is introduced through the first filter unit 321 and the second filter unit 322 of the filter unit 320 is cleanly filtered and is supplied to the sprayer 340 along the cooling pipe 311. .

The water supplied to the sprinkler 340 is sprayed on the heat radiating unit 100 by the sprinkler 340 to take heat from the cooling object to cool the cooling object. Then, the heated water passing through the heat dissipation unit 100 is dropped by gravity and accommodated in the water collector 350.

In such a water-cooled mode, the cooling to the heat dissipation unit 100 is made of water having a specific heat much larger than air, so that the cooling efficiency can be further improved.

Then, when the water level of the water collector 350 becomes high while the amphibian vehicle 10 is in the water-cooled mode, the controller 400 receives the water level measurement value of the water received from the water level detector 370. In this case, as shown in FIG. 5, the controller 400 operates the discharge driver 360 for a predetermined operating time so that the water contained in the water collector 350 is discharged to the outside through the discharge pipe 351. Let it drain.

The operation of discharging the water of the water collector 350 by operating the discharge driver 360 may be implemented intermittently.

Then, when the amphibian vehicle 10 leaves the ground and attempts to start the ground again, as shown in FIG. 6, the driving state sensor 600 is exposed from the water and stops transmitting the detection signal to the controller 400. In addition, the controller 400 automatically stops the operation of the inflow driver 330 as the detection signal is interrupted, operates the cover driver 520 to open the air inlet 220, and operates the cooling fan 210. By doing so, it switches from the water cooling mode to the air cooling mode.

At this time, the discharge driver 360, apart from the stop of the operation of the inlet driver 330, if the predetermined operating time has not yet elapsed, even if the operation of the inlet driver 330 is stopped until the corresponding operating time has elapsed. It is sufficiently operated to discharge the water contained in the collector 350 to the outside.

In addition, even after the water sprayed onto the heat radiating unit 100 is switched to the air cooling mode while evaporating with the operation of the cooling fan 210, the heat dissipation is more efficient than cooling by pure air cooling for a certain time. Cooling to the unit 100 may be made.

As described above, according to the cooling system for an amphibian according to the present invention, the air-cooling device 200 uses air to cool the heat dissipation unit 100 in the air-cooled mode during the ground operation, and water-cooled in the water-cooled mode during the water operation. The apparatus 300 is provided to cool the heat dissipation unit 100 using external water, thereby improving the cooling efficiency during water running through water cooling, and opening and closing device for closing the air inlet 220 during the water cooling mode ( 500 is further provided to fundamentally prevent vehicle sinking due to equipment damage and buoyancy loss caused by water flowing through the air inlet 220 during water operation, and the driving state detector 600 Further, since the switching between the air-cooled mode and the water-cooled mode may be automatically performed by the controller 400 according to the detection signal of the driving state detector 600, it may be easily operated.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical spirit of the present invention, and such modifications and variations belong to the appended claims. will be.

Description of the Related Art [0002]
100: heat dissipation unit 110: supercharged air radiator
111: charge air piping 120: coolant radiator
121: coolant pipe 130: return fuel radiator
131: return fuel pipe 140: lubricant radiator
141: lubricating oil pipe 200: air cooling device
210: cooling fan 220: air inlet
300: water cooling device 310: water inlet
311: cooling piping 320: filtration unit
321: first filter 322: second filter
330: inflow driver 340: sprayer
350: water collector 351: discharge piping
360: exhaust driver 370: water level detector
400 controller 500 switchgear
510: sealing cover 520: cover driver
600: operation state detector 10: amphibious vehicle
11 engine 12 gearbox

Claims (7)

Installed in the amphibian vehicle, the heat dissipation unit through which the cooling object passes, the air cooling unit for cooling the heat dissipation unit during the ground running, the water cooling unit for cooling the heat dissipation unit during the water running, and controls the operation of the air cooling unit and the water cooling apparatus A cooling system comprising a controller,
The air cooling device,
A cooling fan blowing air toward the heat dissipation unit; And an air outlet through which air for cooling the heat radiating part flows in and out;
The water cooling device,
A water inlet through which water is introduced from the outside of the amphibian; An inlet driver installed in a cooling pipe connected to the water inlet to provide water inflow power; A sprinkler for spraying water introduced into and connected to the cooling pipe to the heat dissipation unit; A water collector for receiving heated water through the heat dissipation unit; And a discharge driver installed in a discharge pipe provided outside of the amphibian in the water collector to discharge the water contained in the water collector.
Cooling system for an amphibian, characterized in that the air-cooling mode in which the air-cooling device operates and the water-cooling mode in which the water-cooling device operates. The method of claim 1,
The amphibious vehicle cooling system,
An opening and closing device installed at the air inlet and controlled by the controller to open the air inlet in the air cooling mode and close the air inlet in the water cooling mode;
Amphibious vehicle cooling system further comprising a. The method of claim 1,
The amphibious vehicle cooling system,
It is installed on the outer surface of the amphibian vehicle, a driving state detector for detecting a state in which the amphibious vehicle is submerged in water to transmit a detection signal to the controller;
The controller,
And the air-cooling device and the water-cooling device to operate in the water-cooling mode and the air-cooling mode, respectively, depending on whether the sensed signal is transmitted. The method of claim 1,
The watering machine and the water collecting machine,
Cooling system for an amphibian, characterized in that the water sprayed from the water sprayer to the heat dissipation unit is provided by the gravity and fall on the upper and lower sides of the heat dissipation unit so as to be accommodated in the water collector. 5. The method according to any one of claims 1 to 4,
The water cooling device,
A water level detector for measuring the water level of the water contained in the water collector and delivers the measured value to the controller;
The controller,
And the discharge driver operates when the measured value is equal to or greater than a predetermined reference level value. 5. The method according to any one of claims 1 to 4,
The heat-
A boost air radiator, a coolant radiator, a coolant radiator, a return fuel radiator, and a lubricating oil radiator, respectively, in which the boost air, the coolant, the return fuel heated in the engine of the amphibian vehicle, and the lubricating oil heated in the gearbox of the amphibian vehicle flow in and out respectively. Cooling system for amphibious vehicle, characterized in that. 5. The method according to any one of claims 1 to 4,
The water cooling device,
A first filtration unit installed at the water inlet and primarily filtering large foreign substances contained in water introduced from the outside, and installed in the cooling pipe and included in water transferred through the first filtration unit to the inflow driver A filtration section including a second filtration section for secondaryly filtering the small foreign matter thus obtained;
Amphibious vehicle cooling system further comprising a.

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